Although they were all lucky enough to have escaped physical injury, the experience left its mark in others way and made Liam determined to do what he could to help those who had been less fortunate.
Within weeks, the former Morley Newlands Academy pupil had set himself nine fundraising challenges with the modest goal of raising £100 for the We Love Manchester Emergency Fund – a £1 from each of his 100 Instagram followers.
Liam’s dad, Dan Wilson, said: “We were pretty shell-shocked on the night to be honest. With all he had seen in the arena and on the news, Liam wanted to try to do a bit to help people.
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“He came to us and came up with the idea to try to find things he could do to raise a bit of money. We’re really proud of him and have been getting behind it and supporting him.”
From fun runs and Tough Mudders to the Doncaster Labyrinth Challenge and climbing Mount Snowdon, it has been a busy summer holiday for 11-year-old Liam.
Dan, 30, of Rydal Drive, Morley, said: “Liam likes to get covered in mud so he’s had a lot of fun with it along the way.
“The really tough one was walking up and down Mount Snowdon. That was probably the hardest one we did.”
Liam, who joined Bruntcliffe Academy in Morley this week, had plenty of people rooting for him, including mum Vikki, 28, and sister Sophia, six.
The team at Joe G’s Fitness Centre in Morley have also given Liam some training tips.
And having raised more than £900 to date, Liam has been named as a finalist in the national JustGiving Awards.
Almost 31,000 fundraisers were nominated this year, but Liam is one of just three now in the running for the Young Fundraiser of the Year prize.
“He was shocked, he wasn’t expecting it,” said Dan.
“We didn’t know it was something he could be put forward for but his auntie put him forward. We just got an email out of the blue.
“We’re excited now about going down to the ceremony in London in November.”
They also hope to push the total raised to £1,000.
Anyone wishing to donate can do so by visiting www.justgiving.com/fundraising/liam-wilson12or texting LAMW91 £1 (or other sums) to 70070.